PROBLEM TO BE SOLVED: To provide an instrument for putting illuminating light wavelengths under control, to be used in an aquarium to inhibit algae (moss) to be deposited on the wall surface of the aquarium, through utilizing photosynthetic activity.SOLUTION: The instrument for putting illuminating light wavelengths under control is provided, which is to be used in an aquarium, in an L-shapedly fixed manner the instrument being made by molding processing of such a low-expanded green polyethylene plate or green acrylic plate that illuminating light transmitted through a colored plate installed on the aquarium constitutes a hindrance to growing algae on the wall surface of the aquarium with the colored plate, using the illuminating light emitted from the fluorescent lamp of an illuminator for the aquarium. In the instrument, the L-shaped fixing is made in such a way that one side of the plastic plate is on the front surface of the aquarium, the other side being furnished with a plate for putting illuminating light wavelengths under control. By illuminating the plate for putting illuminating light wavelengths under control with light from the fluorescent lamp to be transmitted through the plate, algae growth on the surface of the aquarium is inhibited thanks to the illuminating light reaching both of the front surface and the bottom of the aquarium.COPYRIGHT: (C)2012,JPO&INPIT【課題】観賞魚用水槽内の壁面に着生する藻(苔)を、光合成作用を利用して抑制する観賞魚用水槽に使用する照明光波長制御具を提供する。【解決手段】観賞魚用水槽の照明装置の蛍光灯の照射光を使用して、色彩板を設けて、色彩版を透過した光が藻の育成に障害となる低発泡緑色ポリエチレン板、あるいは、緑色アクリル板を成形加工してL形固定の観賞魚用水槽に使用する照明光波長制御具を設けた。当該L形固定は一方に水槽内前面部と、他方は照明光波長制御板が設けてある。当該照明光波長制御板に蛍光灯を照射して透過させることで、観賞魚用水槽の水槽前面と観賞面の底に届く照明光により藻の育成を抑制する構成の照明光波長制御具である。【選択図】図1
